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Communicated by John Rhodes
This work has in part been supported by the Center for Mathematical Methods in the Social, Biological, and Health Sciences (State University of New York at Buffalo, Buffalo, New York), by NSF grant GJ 998, and by NATO grant 574.
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van Leeuwen, J. On the fixpoints of monogenic functions in free monoids. Semigroup Forum 10, 315–328 (1975). https://doi.org/10.1007/BF02194900
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DOI: https://doi.org/10.1007/BF02194900